JBO Thread Plug Gauge is a precision instrument for inspecting metric fine-thread holes. Designed for 6H, right-hand M25 x 1 threads, it delivers quick Go/No-Go checks that confirm your holes meet exact specifications. It's a reliable choice for engineers, machinists, inspectors, and workshop technicians who need fast, repeatable results during setup and quality control.

• Go/No-Go inspection design: Quickly verify hole acceptance at a glance, reducing guesswork and speeding up setup and quality checks.
• Metric fine-thread accuracy (M25 x 1, right-hand): Specifically tuned for precise evaluation of metric fine-thread holes, helping ensure consistent assemblies across parts.
• Hardened steel construction: Built to withstand daily shop wear, delivering long-lasting accuracy and excellent resistance to abrasion.

This plug gauge streamlines quality control by providing fast, repeatable pass/fail results, reducing rework and scrap. Its durable build and precise metric sizing give you confidence in every measurement, helping maintain tight tolerances in critical assemblies and supporting smoother, more reliable production workflows.